# Scrapy settings for ff project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'ff'

SPIDER_MODULES = ['ff.spiders']
NEWSPIDER_MODULE = 'ff.spiders'


# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = 'ff (+http://www.yourdomain.com)'

# Obey robots.txt rules
# 协议 国家队使用爬虫
ROBOTSTXT_OBEY = False # 啥也不怕 有问题找老板

LOG_LEVEL = 'INFO'
LOG_FILE = './ff.log'

# Configure maximum concurrent requests performed by Scrapy (default: 16)

#  怼网站的并发请求数量
# CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#  请求间隔时间
DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#  每个域名的最大并发请求
CONCURRENT_REQUESTS_PER_DOMAIN = 16
# 怼IP的请求间隔
#CONCURRENT_REQUESTS_PER_IP = 16

# Disable cookies (enabled by default)
# ＃禁用cookie  默认是true
# COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
# 头部设置的
# DEFAULT_REQUEST_HEADERS = {
#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
#   'Accept-Language': 'en',
# }

# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
# spider middler
# SPIDER_MIDDLEWARES = {
#    'ff.middlewares.FfSpiderMiddleware': 543,
# }

# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# 下载中间件   可以自定义
# DOWNLOADER_MIDDLEWARES = {
#    'ff.middlewares.FfDownloaderMiddleware': 543,
# }

# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
# 状态加监控
#EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
#}

# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
#  存放数据的管道
ITEM_PIPELINES = {
   'ff.pipelines.FfPipeline': 300,
}

# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
# 限速节流算法
# AUTOTHROTTLE_ENABLED = True
# The initial download delay
# 爬虫启动的时候 怼网站发起请求的延迟
# AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
# 请求到响应的最大允许时间
# AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
# 启用限制统计信息
#AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
# HTTPCACHE_ENABLED = True
# HTTPCACHE_EXPIRATION_SECS = 0
# HTTPCACHE_DIR = 'httpcache'
# HTTPCACHE_IGNORE_HTTP_CODES = []
# 将缓存保存到本地文件系统，也可以保存到数据库
# HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'
